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[dxbc] Reverse order of long dot products

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Matches output of AMD's dxbc compiler this way.
This commit is contained in:
Philip Rebohle 2024-08-12 18:26:23 +02:00 committed by Philip Rebohle
parent 813b653645
commit beaf01ecad
1 changed files with 5 additions and 7 deletions
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12
src/dxbc/dxbc_compiler.cpp
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@ -2058,18 +2058,16 @@ namespace dxvk {
uint32_t componentType = getVectorTypeId(dst.type);
uint32_t componentCount = srcMask.popCount();
for (uint32_t i = 1; i <= componentCount; i++) {
uint32_t idx = componentCount - i;
for (uint32_t i = 0; i < componentCount; i++) {
if (dst.id) {
dst.id = m_module.opFFma(componentType,
m_module.opCompositeExtract(componentType, src.at(0).id, 1, &idx),
m_module.opCompositeExtract(componentType, src.at(1).id, 1, &idx),
m_module.opCompositeExtract(componentType, src.at(0).id, 1, &i),
m_module.opCompositeExtract(componentType, src.at(1).id, 1, &i),
dst.id);
} else {
dst.id = m_module.opFMul(componentType,
m_module.opCompositeExtract(componentType, src.at(0).id, 1, &idx),
m_module.opCompositeExtract(componentType, src.at(1).id, 1, &idx));
m_module.opCompositeExtract(componentType, src.at(0).id, 1, &i),
m_module.opCompositeExtract(componentType, src.at(1).id, 1, &i));
}
// Unconditionally mark as precise since the exact order of operation